Tool for placing clearance wrappers on boiler tubes



Se t. 20 ,1927.

TOOL FOR PLACING CLEARANOE,WRAPFERS ON BOILER TUBES Filed Dec. 51,;1925

" per securing latches;

Patented Sept. 20, 1927. l

fuNrr-E J-QHN a. aenownnn, or sr. LOUIS, rssounr.

7 Application filed December This invention relates to a speciallyconstructed spr ng-set clearance or space wrapper for the. water; tubesof steam boilcrs,1an d to a tool for facil tat ng thcplac'i'ng' of'suclrwrappers upon the said tubes, of

' steam boilers, preparatory to the construction or repair. of thebaffles thereof.

In the building of theusual concrete or like -platesinsteanifbo'ileii's, the common practice to leave clearance-spaces betweenthe boiler. tubes and the haftlewall,

whichspaces callted with 'paper'wrappers or the life which contribute tothe easy removal of old tubes and their like replacement by new ones.

This structural feature further eliminates the transmission of vibration'l'rom the tubes to the balile wall during the process of turbining, andthere are other advantages attaching to this structural feature. Inorder to ensure such clearance spaces in the build in of battle walls,wrappers of thick paper are commonly placed around the boiler tubes inthe plane of the proposed wall, spaced wall form's are-then mounted inpo-- sition, and; the viscous concrete or other material is poured inbetween the forms.v

This material readily flows into place be- 1 t" .*."een the forms andaroundthe tubes coveredas stated by the said wrappers, and

when the material is hardened and the forms are removed, the wall isleft complate with the spacing wrappers locked in place.

, repair of the described baffle walls.

In the drawing Figure 1 is .a side elevation of the'tool as in use,showingv a clearance wrapper stretched thereupon in process of applica-.tion to a boiler tube;

- Figure 2 is a view of a sectlon of an oldv ballle wall in process ofrepair, and. showing clearance wrapperas applied thereto by the use ofthis tool;

Figure 3 is an enlarged detail of the working end of the tool, showingthe wrap- The object of the present invention is to provide a simple,practical and efficient 31, 1 925. se i rnouv aesc.

Figure l is an'enlarged detail ofone of the wrappers; r I i I Y Figure 5a detail. showing a modified means for releasably.fastening the forwardend of the spring ring to the, handle bar;

Figure 6 shows a wrapper as integrally formed otresilientlmaterial andadapted to I normally assume the "form of a parted cylr i nd'er. Q. v i'i.

f The invention 1 comprises a suitable 112m. dle bar 1, which ispreferably?flatenais provided at the rem ant working 1 end with abracket or lug'Q from whieh protrudes a fastening pin 3 disposed acrossand parallel to the face of the handle. A flat latch bar l is slidinglymounted through loops 5 in connection with the handle bar 1, the saidloops being secured to the said handle bar. The forward or working endof the latch bar 4 is provided with a latch G in the nature of a lipwhich is spaced from the bar 1 and lies parallel thereto. A clearancewrapper 7 is provided, the same being made of heavy paper or'othersuitable fieXible material, and a spring loop or parted ring 8 isincorporated therein This is accomplished in a simple and efiectivemanner by encircling the wrapper with the ring and passing the ends 9 ofthe ring through slits 10 cut in the wrapper. he ring is so mounted inconnection with the wrapper as to cause the latter to curl in the formand manner in which it is intended to wrapper thus stretched upon thetool is i properly positioned against that part of the boiler tube 11where it isdesired to impose the wrapper, as shown in Figure 1. Thelatch bar 4: is then drawn backward rela-. tive 'to the bar 1, the latch6 is withdrawn from theend of the ring 8, and immediately that end ofthe ring flies loose and encircles manipulate d as to Withdraw the pin 3from the tube 11. 'The handlebar l is then so the eyelet thus leavingthe wrapper T properly mounted in place upon the tube ll.

Various modifications of the method of relcasably mounting thespring-set wrapper upon the tool might be adopted. For instance, asshown in Figure 5, instead of the lug 2 and pin 3, an auxiliary latch 13may be mounted at the forward end of the bar l the same being aduplicate of the latch 6 and arranged in direct alignment therewith. Thering 8 would then be left uniform throughout and at both ends, theeyelet 12 being omitted and the ends of the ring 8 being simply extendedand pressed down under the latches 6 and 13. F HlthGlHlOlG, ii' thewrapper 7 were made 0t somewhat resilient material and formed and setcylindrically, as shown in Figure 6, the spring ring 8 might bedispensed with, as the wrapper would of itself form its own resiliencycoil around the tube 11 when released from the latches 6 and 13.

While I have herein described a certain specific manner and method ofconstructing and assembling the elements of my invention, it isunderstood that I may vary from the same in minor details, not departingfrom the spirit of my invention, so as best to construct a practicaldevice for the purpose intended, as defined in the appended claim.

I claim:

In a device of the kind described, a handle bar having a working end; afastening pin at the Working end of the handle bar; a latch bar slidablymounted in connection with the handle bar, the said latch bar having aworking end disposed adjacent the working end of the handle bar; and alatch at the working end of the latch bar disposed in alignment with thesaid fastening pin at the working end of the handle bar.

In testimony whereof I aflix my signature.

JOHN A. MAGDOWELL.

